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(No Model.)

W. G. HOMAN. WIGK RAISER'POR CENTRAL DRAFT LAMPS.

No. 477,863. Patented June 28, 1892.

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' UNITED STATES; PATE T OFFICE;

. WILLIAM C. I'IOMAN, OF MERIDEN, CONNECTICUT, ASSIGNOR TO THE EDWARDMILLER & COMPANY, OF SAME PLACE.

WICK-RAISER FOR CENTRAL-DRAFT LAMPS.

SPECIFICATION forming part of Letters Patent No; 477,863, dated June 28,1892.

Application filed November 30,1891. Serial No. 413,574. (No model.)

To all whom it may concern.-. the bearing-tube and prevents the downwardBe it known that 1, WILLIAM C. HOMAN, of movement of the sleeve, whilethe inner end Meriden, in the county of New Haven, and of the nutengages with the extreme end of State of Connecticut, have invented anew the bearing-tube and prevents the upward 5 Improvement inWick-Adjusters for Centralmovement of the sleeve, whereby the same isDraft Lamps; and I do hereby declare the held against longitudinalmovementin either following, when taken in connection with acdirection,but is free to rotate. The wickcompanying drawings and the letters ofrefband F, encircling the draft-tube B, is of orerence marked thereon,to be a'full, clear, and dinary construction, and has connected with 1oexact description of the same, and which said it the bent lower end ofthe short leg G of drawings constitute part of this specification, thebowed adj usting-bar, the said leg playand represent, ining up and downthrough an open slot H, Figure 1, a view, partly in side elevationextending outwardly from the inner edge of and partly in verticalsection, of a lamp conthe top of the lamp-fount. The long log G" I5structed in accordance with my invention; of the said adjusting-bar,which is prefer- Fig.2, a detached View in side elevation of ably formedfrom a heavy .rod or wire, isthe wick-band and adjusting-bar; Fig. 3, astraight and extends down through the detached sectional view of thelong screwthreaded sleeveD,before mentioned, through threaded sleeve, tothe lower end whereof the the centrally-perforated operating-nut E, at-2o operating-nut is attached. tached to the lower end thereof, andprojects My invention relates to an improvement in below the said nut,its projecting lower end wick-adjusters for central-draft lamps, thebeing threaded to receive the retaining-butobject being to produce asimple, durable, tonl, which has the twofold function of preeifective,and convenient device adapted for venting the said leg of the bar frombeing 25 direct manual operation through its upper drawn out of thebearing-tube and threaded end or operation by a nut through its lowersleeve and of affording a means for raising end, as found mostconvenient. and lowering the bar by direct or plunging With these endsin view my invention conaction through the lower end of its said leg.sists in awick-adjuster having certain details The long vertical loopformed by the upper 0 of construction and combinations of parts, asportions of the said legs of the bowed adj ustwill be hereinafterdescribed, and pointed ing-bar forms a handle for grasping the same outin the claims. for direct manual operation from the top of The fount Aand central draft-tube B of the lamp-fount. The said long leg G of thethe lamp are of ordinary construction, except bar is provided aboutmidway of its length 3 5 that the former has mounted in it at a pointand, as herein shown, slightly above its longito one side of the saidtube avertical bearingtudinal center with a double spiral thread J, tubeC, which passes through the oil-chamber the same being formed upon thesurface of a and projects a very little out of the fount at short sleeveJ, fixed upon the bar. As hereits upper and lower ends, at which pointsin shown, the said double screw-thread con- 0 40 it is soldered orotherwise sealed, so as to pretains about two turns and is of verycoarse vent any escape of oil from the fount. A pitch, in which itcorresponds to the pitch of long internally-threaded sleeve D is locatedthe thread D of the sleeve D, the said thread within the saidbearing-tube, extending nearly D consisting, as herein shown, of arectanguto the upper end thereof and constructed at lar wire formed intoa coarse spiral and se 5 45 its lower end with a neck D, which, passescured to the inner face of the sleeve, which through the contractedlower end of the tube may, however, if desired, have the thread andreceives the centrally-perforated operatformed in it by an obviousprocess analogous ing-nut E, which is rigidly secured to the said tobeading; but however the threads of the neck. A shoulder d, formedbetween the bar and sleeve are formed it is designed that I00 50 lowerend of the said sleeve D and its neck they shall be so coarse in pitchas to permit D, rests upon the contracted lower end of the bar to beraised and lowered by taking hold of the long loop at its upper end andby taking hold of the knob I, attached to its lower end. In suchoperation of the bar the sleeve and its nut would be rotated in onedirection or the other, according to the way in which the bar was moved,the friction of the described rotation of the sleeve being reduced tothe minimum by contracting its lower end to form the neck Dand shoulderd, thelatter resting upon the contracted lower end of the bearing-tubeC. The object of making the threads very. coarse is of course to reducethe friction of their operation and permit the bar to be plunged, so tospeak, up and down.

I do not limit myself to the use of double threads J on the bar butthreads so constructed reduce the wear and friction of operationgreatly.

To operate the bar from its lower end by the nut E, the same is graspedbetween the fingers and turned, whereby the bar is operated directlythrough the sleeve. To remove the bar, the retaining-button I is takenoff, after which the bar and the wick-band may be drawn out of the lampintegral or without dismemberment, the sleeve and nut remaining in theirnormal positions.

I would have it understood that I do not limit myself to the exactconstruction herein shown and described, but hold myself at liberty tomake such changes and alterations as fairly fall within the spirit andscope of my invention.

I am aware that it is old to provide a lampfount at a point to one sideof its center with a Vertical bearing-tube to contain aninternally-threaded rotatable but longitudinally-immovable sleevereceiving the longleg of a wick-adjuster and furnished at its lower endwith a nut by which it is rotated to move the said wick-adjuster up anddown by screw action; and I do not, therefore, claim that construction,broadly.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a central-draft lamp, the combination, with the fount anddraft-tube thereof, of a bearing-tube mounted in the fount to one sideof the said draft-tube and projecting at its upper and lower endsthrough the fount, a long rotatable sleeve having an internal threadlocated within the said tube, in which it is held against longitudinalmovement, a centrally perforated operating nut rigidly connected withthe lower end of the sleeve, a wick-band encircling the draft-tube, abowed adj usting-bar having its short leg attached to the said band andits long leg passed downward through the said sleeve, through thecentrally-perforated nut connected with the lower end thereof, andprovided with a coarse thread taking into the internal thread of thesleeve, and a removable retaining-button attached to the projectinglower end of the long leg of the said bar, the threads of the sleeve andbar being constructed so coarse in pitch as to permit the bar to bevertically reciprocated manually by direct or plunging movement from itsupper and its lower end, substantially as set forth.

2. In a'central-draft lamp, the combination, with the fount anddraft-tube thereof, of a bearing-tube mounted in the fouut to one sideof the draft-tube and projecting at its open upper and lower ends fromthe fount, alonginternally-screw-threaded rotary sleeve located withinthe said tube and constructed at its lower end with a neck whichprojects from the lower end of the bearing-tube, a centrally-perforatednut attached to the said neck at the lower end of the sleeve, awick-band encircling the draft-tube, a bowed adjustingbar having a shortleg and a long log, the former being attached to the said band and thelatter being passed downward through the said sleeve projecting throughthe centrally-perforated nut at the lower end thereof and provided witha coarsely-pitched double thread co-operating with the internal threadof the sleeve, and a retaining-button removably attached to the saidprojecting lower end of the long leg of the bar, the threads of thesleeve and bar being so coarsely pitched as to permit the same to beoperated manually by direct or'plunging movement from its upper and itslower end, substantially as described.

In testimony whereof I have signed this specification in the presence oftwo subscrib- Witnesses:

S. D. HANNEY, W. L. BABoooK.

